Formation of silver nanoparticles by electron transfer in peptides and c‐cytochromes

Vasylevskyi, Serhii I.; Kracht, Sonja; Corcosa, Paula; Fromm, Katharina M.; Giese, Bernd; Füeg, Michael

doi:10.1002/anie.201702621

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Formation of silver nanoparticles by electron transfer in peptides and c‐cytochromes

Vasylevskyi, Serhii I. Department of Chemistry, University of Fribourg, Switzerland
Kracht, Sonja Department of Chemistry, University of Fribourg, Switzerland
Corcosa, Paula Department of Chemistry, University of Fribourg, Switzerland
Fromm, Katharina M. Department of Chemistry, University of Fribourg, Switzerland
Giese, Bernd Department of Chemistry, University of Fribourg, Switzerland
Füeg, Michael Department of Chemistry and Biochemistry, University of Bern, Switzerland

01.01.2017

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Angewandte Chemie International Edition. - 2017, vol. 56, no. 21, p. 5926-5930

English The reduction of Ag⁺ ions to Ag⁰ atoms is a highly endergonic reaction step, only the aggregation to Ag_n clusters leads to an exergonic process. These elementary chemical reactions play a decisive role if Ag nanoparticles (AgNPs) are generated by electron transfer (ET) reactions to Ag⁺ ions. We studied the formation of AgNPs in peptides by photoinduced ET, and in c-cytochromes by ET from their Fe²⁺/hemes. Our earlier photoinduced experiments in peptides had demonstrated that histidine prevents AgNP formation. We have now observed that AgNPs can be easily synthesized with less-efficient Ag⁺-binding amino acids, and the rate increases in the order lysine

Faculty

Faculté des sciences et de médecine

Department

Département de Chimie

Language